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A220319 T(n,k)=Equals two maps: number of nXk binary arrays indicating the locations of corresponding elements equal to exactly two of their king-move neighbors in a random 0..2 nXk array 3

%I

%S 1,1,1,2,5,2,4,24,24,4,7,89,353,89,7,12,389,3167,3167,389,12,21,1566,

%T 28215,56819,28215,1566,21,37,6401,237144,984087,984087,237144,6401,

%U 37,65,25704,1944692,16290350

%N T(n,k)=Equals two maps: number of nXk binary arrays indicating the locations of corresponding elements equal to exactly two of their king-move neighbors in a random 0..2 nXk array

%C Table starts

%C ..1....1......2......4......7.......12......21....37.65

%C ..1....5.....24.....89....389.....1566....6401.25704

%C ..2...24....353...3167..28215...237144.1944692

%C ..4...89...3167..56819.984087.16290350

%C ..7..389..28215.984087

%C .12.1566.237144

%C .21.6401

%C .37

%e Some solutions for n=3 k=4

%e ..0..1..0..0....0..0..0..0....0..0..0..0....0..0..0..1....0..0..1..1

%e ..0..0..0..1....1..1..0..1....1..1..0..1....0..0..0..0....0..0..0..0

%e ..0..1..0..1....1..1..0..1....0..0..0..0....1..0..0..0....1..0..1..0

%Y Column 1 is A005251(n+1)

%K nonn,tabl

%O 1,4

%A _R. H. Hardin_ Dec 10 2012

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Last modified September 30 11:00 EDT 2022. Contains 357105 sequences. (Running on oeis4.)